/*
 * sound\soc\sunxi\sunxi_snddmic.c
 * (C) Copyright 2010-2016
 * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
 * huangxin <huangxin@allwinnertech.com>
 * wolfgang huang <huangjinhui@allwinnertech.com>
 *
 * some simple description for this code
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 */

#include <linux/module.h>
#include <linux/clk.h>
#include <linux/mutex.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/pcm_params.h>
#include <sound/soc-dapm.h>
#include <linux/io.h>
#include <linux/of.h>

#ifdef CONFIG_SND_SUNXI_MAD
#include "sunxi-mad.h"
static struct sunxi_mad_priv sunxi_dmic_priv;
#endif

static int sunxi_snddmic_hw_params(struct snd_pcm_substream *substream,
					struct snd_pcm_hw_params *params)
{
	struct snd_soc_pcm_runtime *rtd = substream->private_data;
	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
	int ret = 0;
	int freq;

	switch (params_rate(params)) {
	case	8000:
	case	16000:
	case	32000:
	case	12000:
	case	24000:
	case	48000:
	case	96000:
	case	192000:
#ifdef CONFIG_AHUB_FREQ_REQ
		freq = 98304000;
#else
		freq = 24576000;
#endif
		break;
	case	11025:
	case	22050:
	case	44100:
	case	88200:
	case	176400:
#ifdef CONFIG_AHUB_FREQ_REQ
		freq = 90316800;
#else
		freq = 22579200;
#endif
		break;
	default:
		pr_debug("invalid rate setting\n");
		return -EINVAL;
	}

	ret = snd_soc_dai_set_sysclk(cpu_dai, 0, freq, 0);
	if (ret < 0)
		return ret;

	return 0;
}

#ifdef CONFIG_SND_SUNXI_MAD
/*enable the snddmic suspend */
static int sunxi_snddmic_startup(struct snd_pcm_substream *substream)
{
    struct snd_soc_pcm_runtime *rtd = substream->private_data;

    if (sunxi_dmic_priv.mad_bind == 1)
	rtd->dai_link->ignore_suspend = 1;

    return 0;
}

/*disable the snddmic suspend */
static void sunxi_snddmic_shutdown(struct snd_pcm_substream *substream)
{
    struct snd_soc_pcm_runtime *rtd = substream->private_data;

    if (sunxi_dmic_priv.mad_bind == 1)
	rtd->dai_link->ignore_suspend = 0;
}

/*mad_bind config*/
static int sunxi_dmic_set_mad_bind(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	sunxi_dmic_priv.mad_bind = ucontrol->value.integer.value[0];
	return 0;
}

static int sunxi_dmic_get_mad_bind(struct snd_kcontrol *kcontrol,
	struct snd_ctl_elem_value *ucontrol)
{
	ucontrol->value.integer.value[0] = sunxi_dmic_priv.mad_bind;
	return 0;
}

static const char *mad_bind_function[] = {"mad_unbind", "mad_bind"};

static const struct soc_enum mad_bind_enum[] = {
	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(mad_bind_function),
			mad_bind_function),
};

/* dmic machine kcontrols */
static const struct snd_kcontrol_new sunxi_snddmic_controls[] = {
	SOC_ENUM_EXT("dmic bind mad Function", mad_bind_enum[0],
		sunxi_dmic_get_mad_bind, sunxi_dmic_set_mad_bind),
};
#endif

static struct snd_soc_ops sunxi_snddmic_ops = {
	.hw_params	= sunxi_snddmic_hw_params,
#ifdef CONFIG_SND_SUNXI_MAD
	.startup = sunxi_snddmic_startup,
	.shutdown = sunxi_snddmic_shutdown,
#endif
};

static struct snd_soc_dai_link sunxi_snddmic_dai_link = {
	.name		= "DMIC",
	.stream_name	= "SUNXI-DMIC",
	.cpu_dai_name	= "sunxi-dmic",
	.platform_name	= "sunxi-dmic",
	.codec_name	= "dmic-codec",
	.codec_dai_name = "dmic-hifi",
	.ops		= &sunxi_snddmic_ops,
};

static struct snd_soc_card snd_soc_sunxi_snddmic = {
	.name		= "snddmic",
	.owner		= THIS_MODULE,
	.dai_link	= &sunxi_snddmic_dai_link,
	.num_links	= 1,
#ifdef CONFIG_SND_SUNXI_MAD
	.controls = sunxi_snddmic_controls,
	.num_controls = ARRAY_SIZE(sunxi_snddmic_controls),
#endif
};

static int sunxi_snddmic_dev_probe(struct platform_device *pdev)
{
	int ret = 0;
	struct snd_soc_card *card = &snd_soc_sunxi_snddmic;
	struct device_node *np = pdev->dev.of_node;
	struct platform_device *sunxi_snd_dmic_codec_device;

	card->dev = &pdev->dev;

	sunxi_snddmic_dai_link.cpu_dai_name = NULL;
	sunxi_snddmic_dai_link.cpu_of_node = of_parse_phandle(np,
					"sunxi,dmic-controller", 0);
	if (!sunxi_snddmic_dai_link.cpu_of_node) {
		dev_err(&pdev->dev, "Property 'sunxi,dmic-controller' missing or invalid\n");
		ret = -EINVAL;
		return ret;
	}
	sunxi_snddmic_dai_link.platform_name = NULL;
	sunxi_snddmic_dai_link.platform_of_node =
				sunxi_snddmic_dai_link.cpu_of_node;

	sunxi_snd_dmic_codec_device = platform_device_alloc("dmic-codec", -1);
	if (!sunxi_snd_dmic_codec_device) {
		dev_err(&pdev->dev, "dmic codec alloc failed\n");
		ret = -ENOMEM;
		return ret;
	}

	ret = platform_device_add(sunxi_snd_dmic_codec_device);
	if (ret) {
		dev_err(&pdev->dev, "dmic codec add failed\n");
		ret = -EBUSY;
		goto err_dmic_put;
	}

#ifdef CONFIG_SND_SUNXI_MAD
    sunxi_dmic_priv.mad_bind = 0;
	snd_soc_card_set_drvdata(card, &sunxi_dmic_priv);
#endif

	ret = snd_soc_register_card(card);
	if (ret) {
		dev_err(&pdev->dev, "snd_soc_register_card() fail: %d\n", ret);
		ret = -EBUSY;
		goto err_dmic_del;
	}
	return ret;

err_dmic_del:
	platform_device_del(sunxi_snd_dmic_codec_device);
err_dmic_put:
	platform_device_put(sunxi_snd_dmic_codec_device);
	return ret;
}

static int sunxi_snddmic_dev_remove(struct platform_device *pdev)
{
	struct snd_soc_card *card = platform_get_drvdata(pdev);

	snd_soc_unregister_card(card);
	return 0;
}

static const struct of_device_id sunxi_dmic_of_match[] = {
	{ .compatible = "allwinner,sunxi-dmic-machine", },
	{},
};

static struct platform_driver sunxi_dmic_driver = {
	.driver = {
		.name = "snddmic",
		.owner = THIS_MODULE,
		.of_match_table = sunxi_dmic_of_match,
		.pm = &snd_soc_pm_ops,
	},
	.probe = sunxi_snddmic_dev_probe,
	.remove = sunxi_snddmic_dev_remove,
};

module_platform_driver(sunxi_dmic_driver);

MODULE_AUTHOR("wolfgang huang <huangjinhui@allwinnertech.com>");
MODULE_DESCRIPTION("SUNXI DMIC Machine ASoC driver");
MODULE_ALIAS("platform:snddmic");
MODULE_LICENSE("GPL");